GB2055122A - Austenitic corrosion-resistant steels - Google Patents
Austenitic corrosion-resistant steels Download PDFInfo
- Publication number
- GB2055122A GB2055122A GB8021028A GB8021028A GB2055122A GB 2055122 A GB2055122 A GB 2055122A GB 8021028 A GB8021028 A GB 8021028A GB 8021028 A GB8021028 A GB 8021028A GB 2055122 A GB2055122 A GB 2055122A
- Authority
- GB
- United Kingdom
- Prior art keywords
- weight
- corrosion
- steel
- austenitic
- balance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 25
- 239000010959 steel Substances 0.000 title claims abstract description 25
- 238000005260 corrosion Methods 0.000 title abstract description 28
- 230000007797 corrosion Effects 0.000 title abstract description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 10
- 239000011575 calcium Substances 0.000 claims abstract description 10
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 8
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 6
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 6
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 5
- 239000011651 chromium Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 239000011572 manganese Substances 0.000 claims description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims description 5
- 239000011733 molybdenum Substances 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 229910052720 vanadium Inorganic materials 0.000 claims description 5
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 5
- 238000000137 annealing Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 241000272534 Struthio camelus Species 0.000 description 1
- GJPVPJBNBCITNZ-UHFFFAOYSA-N [N].[Mn].[Cr] Chemical compound [N].[Mn].[Cr] GJPVPJBNBCITNZ-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
Abstract
An austenitic steel is provided which contains 0.004 to 0.015% by weight calcium together with in wt%:- Cr 12 - 30 Mn 5 - 35 N 0.35 - 1.6 C 0.02 - 0.2 Si 0.2 - 6 Ni 0 - 10 Cu 0 - 4 Mo 0 - 6 V 0 - 2.5 Fe balance One steel of the invention consists of 0.05% C, 12% Mn, 20% Cr, 0.56% N, 1-10% Si and 0.008% Ca, the balance being iron. The steels provided by the invention have high resistance to intercrystalline corrosion, stress corrosion and to corrosion under vibrational load.
Description
SPECIFICATION
Austenitic corrosion-resistant steels
This invention relates to an austenitic corrosion-resistant steel, and more particularly to a chromiummanganese-nitrogen steel of increased corrosion resistance, particularly to intercrystalline corrosion, stress corrosion and corrosion under vibrational load.
Nitrogen-chromium-manganse austenitic steels are known which possess good corrosion resistance (see, for example, U.S. Patent Specifications Nos. 251,637; 403,347; 465;782 and 419,576; German Patent
Specifications Nos. 2,447,318 and 2,703,757; Austrian Patents Nos. 333,818 and 337,235; and Bulgarian
Patent Specification No. 18,721). Their advantage lies in that they do not contain nickel at all, or contain less nickel than the known nickel-containing austenitic steels and are characterised by higher strength. A drawback of these steels is their strong susceptibility to intercrystalline corrosion after annealing in the temperature range from 500 to 1 000"C or an equivalent heat treatment. The same drawback is apparent with stress corrosion and corrosion under vibrational load.This creates difficulties in their welding.
The use of calcium, magnesium and rare earth elements is known for improving the casting properties and deep deoxidation of steels (see USSR Patent No. 535,337 and German Patent Specification No. 2,706,514), for increasing the plasticity of steels in the hot state (see German Patent Specification Nos. 2,752,082; 2,752,083; and 2,721,998), for desulphuration and for forming in steels non-metallic inclusions of a more favourable shape.
It is therefore an object of this invention to provide an austenitic corrosion-resistant chromiummanganese-nitrogen steel which is resistant to intercrystalline corrosion, to stress corrosion and to corrosion under vibrational load in the hardened, as well as in the annealed state, and which also possesses a number of other favourable properties, such as good mechanical characteristics; great plasticity and ductility at low, as well as at high, temperatures; high resistance to general and pitting corrosion; good casting properties and high technological plasticity.
According to the present invention, there is provided an austenitic steel which contains 0.004 to 0.015% by weight calcium.
from 12to30% by weight chromium; from 5 to 35% by weight manganese;
from 0.35 to 1.60 % by weight nitrogen;
from 0.02 to 0.20 % by weight carbon; and
from 0.20 to 6.00 % by weight silicon, and optionally
up to 10% by weight nickel
up to 4% by weight copper,
up to 6% by weight molybdenum and
up to 2.5% by weight vanadium, the balance being iron with any incidental impurities.
Where some or all of the optional ingredients are present, their preferred ranges of concentration are as follows:
nickel from 2.00 to 10.00 % by weight
copper from 2.00 to 4.00 % by weight
molybdenum from 3.00 to 6.00 % by weight
vanadium from 1.00 to 2.50 % by weight.
The presence of incidental impurities in the iron is determined by the nature of the steel making process.
An advantage of the steels of this invention lies in their high resistance to intercrystalline corrosion, stress corrosion and corrosion under vibrational load in the hardened, as well as in the annealed, state, as compared to the normal known austenitic chromium-manganese-nitrogen steels. Moreover, they permit the achievement of otherfavourable properties, such as good mechanical characteristics, great plasticity and ductility at low and high temperatures, high resistance to general and pitting corrosion, good casting properties and good technological plasticity. Furthermore they are very economical.
One embodiment of a steel in accordance with this invention consists of from 16 to 25% by weight chromium; from 10to 15% by weight manganese; from 0.8 to 1.5% by weight silicon; fom 0.4to 0.8% by weight nitrogen; from 0.03 to 0.08% by weight carbon; and from 0.005 to 0.012% by weight calcium, the balance being iron with any incidental impurities.
The invention will be illustrated by the following example.
Example
A corrosion-resistant steel with the following chemical composition (in % by weight) was prepared; carbon 0.05, manganese 12.00, chromium 20.00, nitrogen 0.56, silicon 1.10, and calcium 0.008 (balance iron).
This steel was found to be several times more resistant to intercrystalline corrosion than a steel of the same composition, but without calcium. The thus calcium-alloyed steel of this invention does not show any susceptibility to intercrystalline corrosion at temperatures of 500, 700, 800 and 900 C, while at 600"C the maximum penetration resulting from intercrystalline corrosion is 120 microns and becomes apparent only after about 20 hours annealing; in contrast the steel which does not contain calcium shows a susceptibility to intercrystalline corrosion over the whole range from 500 to 900"C and corrosion begins after very short annealing times, as for example after 10 minutes annealing at 700"C there is observed a penetration of 120 microns.
The data for intercrystalline corrosion cited above were obtained by the Strauss method.
Claims (4)
1. An austenitic steel which contains 0.004 to 0.015% by weight calcium; from 12 to 30% by weight chromium; from 5 to 35% by weight manganese; from 0.35 to 1.60% by weight nitrogen; from 0.02 to 0.20% by weight carbon; and from 0.20 to 6.00% by weight silicon, and optionally up to 10% by weight nickel, up to 4% by weight copper, up to 6% by weight molybdenum, and up to 2.5% by weight vanadium, the balance being iron with any incidental impurities.
2. A steel as claimed in claim 1, which contains one or more of the elements nickel, copper, molybdenum and vanadium in the following amounts (expressed as percentages by weight): nickel, from 2 to 10; copper, from 2 to 4; molybdenum, from 3 to 6; and vanadium, from 1.0 to 2.5.
3. A steel as claimed in claim 1, which consists of from 16 to 25% by weight chromium; from 10 to 15% by weight manganese; from 0.8 to 1.5% by weight silicon; from 0.4 to 0.8% by weight nitrogen; from 0.03 to 0.08% by weight carbon; and from 0.005 to 0.012% by weight calcium, the balance being iron with any incidental impurities.
4. An austenitic steel substantially as described in the foregoing Example.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BG7944117A BG29797A1 (en) | 1979-06-27 | 1979-06-27 | Austenite corrosion resistant steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2055122A true GB2055122A (en) | 1981-02-25 |
| GB2055122B GB2055122B (en) | 1983-02-16 |
Family
ID=3906261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8021028A Expired GB2055122B (en) | 1979-06-27 | 1980-06-26 | Austenitic corrosion-resistant steels |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5620151A (en) |
| BG (1) | BG29797A1 (en) |
| DE (1) | DE3023590A1 (en) |
| GB (1) | GB2055122B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0065631A1 (en) * | 1981-03-20 | 1982-12-01 | Kabushiki Kaisha Toshiba | Corrosion-resistant non-magnetic steel and retaining ring for a generator made of it |
| EP0285128A2 (en) * | 1987-03-30 | 1988-10-05 | Kabushiki Kaisha Toshiba | Manufacturing method for high hardness member |
| CH684979GA3 (en) * | 1992-07-07 | 1995-02-28 | Boehler Ybbstalwerke | Corrosion-resistant alloy for use as a material for parts in contact with living beings. |
| EP1626101A1 (en) * | 2004-08-13 | 2006-02-15 | Daido Tokushuko Kabushiki Kaisha | High-nitrogen austenitic stainless steel |
| EP1783240A1 (en) * | 2005-11-03 | 2007-05-09 | Daido Steel Co., Ltd. | High-nitrogen austentic stainless steel |
| WO2014012748A1 (en) * | 2012-07-16 | 2014-01-23 | Schaeffler Technologies AG & Co. KG | Rolling bearing element, in particular rolling bearing ring |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0390536A (en) * | 1989-08-31 | 1991-04-16 | Nippon Stainless Steel Co Ltd | High strength non-magnetic stainless steel |
| RU2001155C1 (en) * | 1992-01-29 | 1993-10-15 | Научно-производственное предпри тие "Салма" | Cast austenite steel |
-
1979
- 1979-06-27 BG BG7944117A patent/BG29797A1/en unknown
-
1980
- 1980-06-24 DE DE19803023590 patent/DE3023590A1/en not_active Withdrawn
- 1980-06-26 GB GB8021028A patent/GB2055122B/en not_active Expired
- 1980-06-27 JP JP8672380A patent/JPS5620151A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0065631A1 (en) * | 1981-03-20 | 1982-12-01 | Kabushiki Kaisha Toshiba | Corrosion-resistant non-magnetic steel and retaining ring for a generator made of it |
| EP0285128A2 (en) * | 1987-03-30 | 1988-10-05 | Kabushiki Kaisha Toshiba | Manufacturing method for high hardness member |
| EP0285128A3 (en) * | 1987-03-30 | 1989-10-25 | Kabushiki Kaisha Toshiba | Manufacturing method for high hardness member |
| CH684979GA3 (en) * | 1992-07-07 | 1995-02-28 | Boehler Ybbstalwerke | Corrosion-resistant alloy for use as a material for parts in contact with living beings. |
| EP0640695A1 (en) * | 1992-07-07 | 1995-03-01 | BÖHLER Edelstahl GmbH | Corrosion resistant alloy, useful as material for parts in contact with living beings |
| EP1626101A1 (en) * | 2004-08-13 | 2006-02-15 | Daido Tokushuko Kabushiki Kaisha | High-nitrogen austenitic stainless steel |
| EP1783240A1 (en) * | 2005-11-03 | 2007-05-09 | Daido Steel Co., Ltd. | High-nitrogen austentic stainless steel |
| WO2014012748A1 (en) * | 2012-07-16 | 2014-01-23 | Schaeffler Technologies AG & Co. KG | Rolling bearing element, in particular rolling bearing ring |
| CN104662312A (en) * | 2012-07-16 | 2015-05-27 | 舍弗勒技术股份两合公司 | Rolling bearing element, in particular rolling bearing ring |
Also Published As
| Publication number | Publication date |
|---|---|
| BG29797A1 (en) | 1981-02-16 |
| DE3023590A1 (en) | 1981-01-22 |
| JPS5620151A (en) | 1981-02-25 |
| GB2055122B (en) | 1983-02-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |